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On Saturday 17 September 2005 16:32, Dan Johansson wrote: |
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> Hi, |
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> |
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> A few days ago I had to replace my Motherboard and CPU. Now I want to make |
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> use of the new CPUs features. |
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> Old CPU: Intel Pentium 4 |
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> New CPU: Intel Pentium 4 (Prescott) |
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ok, remember though, new Motherboard is usually = new IDE controller, new PCI |
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stuff, etc. Don't forget your kernel too! |
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> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca |
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> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm pni |
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> monitor ds_cpl est cid cx16 xtpr |
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> bogomips : 6340.60 |
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cpu flags here |
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> So I'm planning to do something along these lines: |
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> |
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> 1) Change CFLAGS in make.conf |
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> Old: CFLAGS="-O2 -mcpu=pentium4 -march=pentium4 -fomit-frame-pointer |
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> -pipe" New: CFLAGS="-O2 -march=prescott -mmmx -msse -msse2 --pipe |
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> -fomit-frame-pointer" |
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Bad, -march=prescott by itself implies this when passed to gcc: |
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options passed: -v -march=prescott -auxbase |
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options enabled: -feliminate-unused-debug-types -fpeephole -ffunction-cse |
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-fkeep-static-consts -fpcc-struct-return -fgcse-lm -fgcse-sm -fgcse-las |
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-fsched-interblock -fsched-spec -fsched-stalled-insns |
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-fsched-stalled-insns-dep -fbranch-count-reg -fcommon -fargument-alias |
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-fzero-initialized-in-bss -fident -fmath-errno -ftrapping-math -m80387 |
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-mhard-float -mno-soft-float -mieee-fp -mfp-ret-in-387 |
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-maccumulate-outgoing-args -mmmx -msse -msse2 -msse3 -mno-red-zone |
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-mtls-direct-seg-refs -mtune=prescott -march=prescott |
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main |
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New: CFLAGS="-O2 -march=prescott -pipe -fomit-frame-pointer" |
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is enough. |
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> 2) emerge --emptytree system |
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> 3) emerge --emptytree world |
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system is part of world. When you do `emerge system` at the beginning, all |
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system packages are added to world. I'd say: |
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`emerge -ev world` |
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to see what will go down and then |
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`emerge -e world` |
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to actually emerge the stuff. |
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> Would that be the right CFLAGS for this CPU? And would it be the right |
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> procedure to get my system "up to date" with my new CPU? |
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Pretty much. |
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Chris White |
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